Hydrodynamic and geometric effects in the sedimentation of model run-and-tumble microswimmers

The sedimentation process in an active suspension is the result of the competition between gravity and the autonomous motion of particles. We carry out simulations of run-and-tumble squirmers that move in a fluid medium, focusing on the dependence of the non-equilibrium steady state on the swimming...

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Autores: Scagliarini, Andrea, Pagonabarraga Mora, Ignacio
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2022
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:2445/193867
Acceso en línea:https://hdl.handle.net/2445/193867
Access Level:acceso abierto
Palabra clave:Hidrodinàmica
Microorganismes
Matèria condensada tova
Hydrodynamics
Microorganisms
Soft condensed matter
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spelling Hydrodynamic and geometric effects in the sedimentation of model run-and-tumble microswimmersScagliarini, AndreaPagonabarraga Mora, IgnacioHidrodinàmicaMicroorganismesMatèria condensada tovaHydrodynamicsMicroorganismsSoft condensed matterThe sedimentation process in an active suspension is the result of the competition between gravity and the autonomous motion of particles. We carry out simulations of run-and-tumble squirmers that move in a fluid medium, focusing on the dependence of the non-equilibrium steady state on the swimming properties. We find that for large enough activity, the density profiles are no longer simple exponentials; we recover the numerical results through the introduction of a local effective temperature, suggesting that the breakdown of the Perrin-like exponential form is a collective effect due to fluid-mediated dynamic correlations among particles. We show that analogous concepts can also fit the case of active non-motile particles, for which we report the first study of this kind. Moreover, we provide evidence of scenarios where the solvent hydrodynamics induces non-local effects which require the full three-dimensional dynamics to be taken into account in order to understand sedimentation in active suspensions. Finally, analyzing the statistics of the orientations of microswimmers, the emergence of a height-dependent polar order in the system is discussed.Royal Society of Chemistry2023202320222023info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersion7 p.application/pdfhttps://hdl.handle.net/2445/193867Articles publicats en revistes (Física de la Matèria Condensada)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a: https://doi.org/10.1039/D1SM01594JSoft Matter, 2022, vol. 18, p. 2407-2413https://doi.org/10.1039/D1SM01594Jcc-by (c) Scagliarini, Andrea et al., 2022http://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccessoai:recercat.cat:2445/1938672026-05-29T05:05:01Z
dc.title.none.fl_str_mv Hydrodynamic and geometric effects in the sedimentation of model run-and-tumble microswimmers
title Hydrodynamic and geometric effects in the sedimentation of model run-and-tumble microswimmers
spellingShingle Hydrodynamic and geometric effects in the sedimentation of model run-and-tumble microswimmers
Scagliarini, Andrea
Hidrodinàmica
Microorganismes
Matèria condensada tova
Hydrodynamics
Microorganisms
Soft condensed matter
title_short Hydrodynamic and geometric effects in the sedimentation of model run-and-tumble microswimmers
title_full Hydrodynamic and geometric effects in the sedimentation of model run-and-tumble microswimmers
title_fullStr Hydrodynamic and geometric effects in the sedimentation of model run-and-tumble microswimmers
title_full_unstemmed Hydrodynamic and geometric effects in the sedimentation of model run-and-tumble microswimmers
title_sort Hydrodynamic and geometric effects in the sedimentation of model run-and-tumble microswimmers
dc.creator.none.fl_str_mv Scagliarini, Andrea
Pagonabarraga Mora, Ignacio
author Scagliarini, Andrea
author_facet Scagliarini, Andrea
Pagonabarraga Mora, Ignacio
author_role author
author2 Pagonabarraga Mora, Ignacio
author2_role author
dc.subject.none.fl_str_mv Hidrodinàmica
Microorganismes
Matèria condensada tova
Hydrodynamics
Microorganisms
Soft condensed matter
topic Hidrodinàmica
Microorganismes
Matèria condensada tova
Hydrodynamics
Microorganisms
Soft condensed matter
description The sedimentation process in an active suspension is the result of the competition between gravity and the autonomous motion of particles. We carry out simulations of run-and-tumble squirmers that move in a fluid medium, focusing on the dependence of the non-equilibrium steady state on the swimming properties. We find that for large enough activity, the density profiles are no longer simple exponentials; we recover the numerical results through the introduction of a local effective temperature, suggesting that the breakdown of the Perrin-like exponential form is a collective effect due to fluid-mediated dynamic correlations among particles. We show that analogous concepts can also fit the case of active non-motile particles, for which we report the first study of this kind. Moreover, we provide evidence of scenarios where the solvent hydrodynamics induces non-local effects which require the full three-dimensional dynamics to be taken into account in order to understand sedimentation in active suspensions. Finally, analyzing the statistics of the orientations of microswimmers, the emergence of a height-dependent polar order in the system is discussed.
publishDate 2022
dc.date.none.fl_str_mv 2022
2023
2023
2023
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/193867
url https://hdl.handle.net/2445/193867
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.1039/D1SM01594J
Soft Matter, 2022, vol. 18, p. 2407-2413
https://doi.org/10.1039/D1SM01594J
dc.rights.none.fl_str_mv cc-by (c) Scagliarini, Andrea et al., 2022
http://creativecommons.org/licenses/by/3.0/es/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Scagliarini, Andrea et al., 2022
http://creativecommons.org/licenses/by/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 7 p.
application/pdf
dc.publisher.none.fl_str_mv Royal Society of Chemistry
publisher.none.fl_str_mv Royal Society of Chemistry
dc.source.none.fl_str_mv Articles publicats en revistes (Física de la Matèria Condensada)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.811543

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